The harmful effects of soil pollution may come from direct contact with polluted soil or from contact with other resources, such as water or food which has been grown on or come in direct contact with the polluted soil.
A reason for your arm or hand falling asleep at night could be because of having a stroke. A stroke is a life-threatening emergency that happens when there is a disruption in the flow of blood to your brain. This can cause paralysis, loss of consciousness, numbness on one side of the body, and impaired speech.
My arms fall asleep at night when I am sleeping on my side with my hands next to me. I am not sleeping on them however they are bent up at the elbow. I do not wake up in the morning with dead arms, but it wakes me up during the night.